Im changing the differential and tranny fluid on this friday and need some suggestions what type of fluid to put.

I talked to the guys at street image and they told me factory fluids are the best ones to go and the differential fluid from factory is synthetic, is that true?

Also my car takes a lot of beating as far as drag strips and canyon ripping so what would u guys recommend and price is not a issue. Please be specific on oil type and grade.

Thank you.

FYI: I did search and didn't find exact answer to my questions.

 

yes,our fluids from factory is synthetic

 

Redline diff gear oil/ allready has friction modifier for the LSD. Or you can go with Amsoil but you have to add fiction modifier. 75w90 shoulld be the usual one. I use redline and i like it so far.

 

You don't need an additive for the lsd. I asked that question here https://g35driver.com/forums/drivetrain/122642-additive-lsd-diff.html I have amsoil in my diff now and there is no chatter.

 

BTW I am 6MT.

Thnx for the replies.
Any more replies would be appreciated

 

Mobil 1 gear oil 75w-90 youll be fine.... the stock dealer fluid is crap its like water. Amsoil or Motul will be fine too... Ive been using Mobil and I love it but going to try Motul on my next swap

 

so u use 75w-90 for tranny and the diff?
Im such a noob at this.

 

No don't use that for your tranny. The tranny calls for GL-4, which is for soft metals(copper). The diff uses GL-5, 75w-90 works. GL-4 is hard to find in synthetic, unless you go with the oem fluid(I forget the weight). Good Luck.

 

I use Red Line oils

 

I've used 80w-90 synthetic made for lsd's in both the rear diff and tranny on an 03 6mt and had no problems with it.
-GP-

 

damn it feels good to have tranny, clutch, diff, and brake fluid changed in the car eventhough u notice nothing while driving it.